Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/7534
Title: P3HT-graphene bilayer electrode for Schottky junction photodetectors
Authors: Aydın, Hasan
Kalkan, Sırrı Batuhan
Varlıklı, Canan
Çelebi, Cem
Keywords: Graphene
Photodetectors
P3HT
Electrodes
Electric rectifiers
Charge transfer
Issue Date: Feb-2018
Publisher: IOP Publishing Ltd.
Source: Aydın, H., Kalkan, S. B., Varlıklı, C., and Çelebi, C. (2018). P3HT-graphene bilayer electrode for Schottky junction photodetectors. Nanotechnology, 29(14). doi:10.1088/1361-6528/aaaaf5
Abstract: We have investigated the effect of a poly (3-hexylthiophene-2.5-diyl)(P3HT)-graphene bilayer electrode on the photoresponsivity characteristics of Si-based Schottky photodetectors. P3HT, which is known to be an electron donor and absorb light in the visible spectrum, was placed on CVD grown graphene by dip-coating method. The results of the UV-vis and Raman spectroscopy measurements have been evaluated to confirm the optical and electronic modification of graphene by the P3HT thin film. Current-voltage measurements of graphene/Si and P3HT-graphene/Si revealed rectification behavior confirming a Schottky junction formation at the graphene/Si interface. Time-resolved photocurrent spectroscopy measurements showed the devices had excellent durability and a fast response speed. We found that the maximum spectral photoresponsivity of the P3HT-graphene/Si photodetector increased more than three orders of magnitude compared to that of the bare graphene/Si photodetector. The observed increment in the photoresponsivity of the P3HT-graphene/Si samples was attributed to the charge transfer doping from P3HT to graphene within the spectral range between near-ultraviolet and near-infrared. Furthermore, the P3HT-graphene electrode was found to improve the specific detectivity and noise equivalent power of graphene/Si photodetectors. The obtained results showed that the P3HT-graphene bilayer electrodes significantly improved the photoresponsivity characteristics of our samples and thus can be used as a functional component in Si-based optoelectronic device applications.
URI: https://doi.org/10.1088/1361-6528/aaaaf5
https://hdl.handle.net/11147/7534
ISSN: 0957-4484
0957-4484
1361-6528
Appears in Collections:Photonics / Fotonik
Physics / Fizik
PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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